Image forming apparatus

ABSTRACT

An image forming apparatus is provided with a display device for displaying an operation guide to an operator, and a display controller for causing the display device to display an operation procedure comprised of a plurality of operations as the operation guide while automatically switching the respective operations in rotation.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an image forming apparatus such as acopier, a facsimile machine or a composite apparatus.

2. Description of the Related Art

In an image forming apparatus such as a copier, a facsimile machine or acomposite apparatus, it has been conventionally known to display a guideto the procedure for the removal of an error on a display deviceprovided in an operation panel if an error such as a sheet jam hasoccurred (see, for example, Japanese Unexamined Patent Publication No.2005-208335). In this image forming apparatus, an error occurring at thetime can be removed if an operator carries out an operation inaccordance with an error removing procedure displayed on the displaydevice.

However, in the image forming apparatus disclosed in the abovepublication, operation display screens for guiding the error removingprocedure cannot be switched unless the operator presses a frame advancekey or a frame rewind key down, wherefore user-friendliness lacks.

SUMMARY OF THE INVENTION

In order to solve the aforementioned problem, an object of the presentinvention is to provide an image forming apparatus having gooduser-friendliness at the time of guiding an operator with an errorremoving procedure.

Specifically, the present invention is directed to an image formingapparatus, comprising display portion for displaying an operation guideto an operator; and display controller for causing the display portionto display an operation procedure comprised of a plurality of operationsas the operation guide while automatically switching the respectiveoperations in rotation.

According to the present invention, since the display controller causesthe display portion to display the operation procedure comprised of theplurality of operations as the operation guide while automaticallyswitching the respective operations in rotation, the operator can graspthe operation succeeding the one being displayed on the display portionwithout being forced to switch the display screen.

These and other objects, features, aspects and advantages of the presentinvention will become more apparent upon a reading of the followingdetailed description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic side view in section mainly showing theconstruction of a composite apparatus according to one embodiment of theinvention.

FIG. 2 is a control block diagram of the composite apparatus shown inFIG. 1.

FIG. 3 is a flow chart showing a screen display switching control of adisplay device in the event of an operation error in the compositeapparatus.

FIG. 4 is a diagram showing an example of a display screen showing thatcopying is in process.

FIG. 5 is a diagram showing an example of a display screen in the eventof an operation error caused by a sheet jam.

FIG. 6 is a transition diagram of display screens of the display device.

FIG. 7 is a flow chart showing a second embodiment of the screen displayswitching control of the display device in the event of an operationerror in the composite apparatus.

FIG. 8 is a transition diagram of display screens of the display device.

FIG. 9 is a flow chart showing a third embodiment of the screen displayswitching control of the display device in the event of an operationerror in the composite apparatus.

FIG. 10 is a diagram showing the transition of display screens showingan operation procedure in the event of an operation error caused by asheet jam.

FIG. 11 is a diagram showing the transition of display screens showingan operation procedure in the event of an operation error caused by asheet jam, wherein already completed operations are displayed in adifferent color.

FIG. 12 is a diagram showing the transition of display screens showingan operation procedure in the event of an operation error caused by asheet jam, wherein already completed operations are displayed in anotherdisplay mode.

FIG. 13 is a flow chart showing a fourth embodiment of the screendisplay switching control of the display device in the event of anoperation error in the composite apparatus.

FIG. 14 is a diagram showing the transition of display screens showingan operation procedure in the event of an operation error caused by asheet jam, wherein already completed operations are displayed in adifferent display mode.

FIG. 15 is a control block diagram of the composite apparatus carryingout screen display switching controls of fifth to eighth embodiments.

FIG. 16 is a flow chart showing the screen display switching control ofthe display device in the event of an operation error.

FIG. 17 is a transition diagram of display screens showing an operationprocedure in the event of an operation error caused by a sheet jam.

FIG. 18 is a diagram showing a display example of detailed explanation.

FIG. 19 is a flow chart showing the sixth embodiment of the screendisplay switching control of the display device in the event of anoperation error in the composite apparatus.

FIG. 20 is a flow chart showing the seventh embodiment of the screendisplay switching control of the display device in the event of anoperation error in the composite apparatus.

FIG. 21 is a flow chart showing the eighth embodiment of the screendisplay switching control of the display device in the event of anoperation error in the composite apparatus.

FIG. 22 is a control block diagram showing the composite apparatuscarrying out a screen display switching control of a ninth embodiment.

FIG. 23 is a flow chart showing the ninth embodiment of the screendisplay switching control of the display device in the event of anoperation error in the composite apparatus.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, a composite apparatus as one, embodiment of an imageforming apparatus according to the present invention is described withreference to the accompanying drawings.

FIG. 1 is a schematic side view in section mainly showing theconstruction of a composite apparatus according to one embodiment of thepresent invention. A composite apparatus 1 is comprised of a main unit200, a sheet post-processing unit 300 arranged at a sheet dischargeside, e.g. at the left side of the main unit 200, an operation unit 400used by an operator to input various operation commands and the like,and a document reading unit 500 arranged atop the main unit 200, and adocument feeding unit 600 arranged atop the document reading unit 500.

The operation unit 400 is provided with a display device 410 includingan LCD (liquid crystal display) or the like, and an operation keyassembly 430 used by the operator to input operation instructions. Theoperation key assembly 430 includes a start key, a numeric pad and thelike.

The document feeding unit 600 is provided with a document placingportion 601, a feed roller 602, a document conveying portion 603 and adocument discharging portion 604, whereas the document reading unit 500is provided with a scanner 501. The feed roller 602 dispenses aspecified number of documents set on the document placing portion 601one by one, and the document conveying portion 603 successively conveysthe dispensed documents to a reading position. The scanner 501successively reads images of the documents being conveyed, and thedocuments having the images thereof read are discharged to the documentdischarging portion 604.

The main unit 200 is provided with a plurality of sheet cassettes 201, aplurality of feed rollers 202, a transfer roller 203, a photoconductivedrum 204, an exposing device 206, a developing device 207, a fixingroller 208, a discharge opening 209, a discharge tray 210 and the like.

The photoconductive drum 204 is uniformly charged by a charging device(not shown) while being rotated in a direction of arrow. The exposingdevice 206 irradiates the photoconductive drum 204 with a laser beammodulated in accordance with a document image data read by the documentreading unit 500 to form an electrostatic latent image of each color onthe outer circumferential surface of the drum 204. The developing device207 supplies black developing agent to the photoconductive drum 204 toform a toner image.

On the other hand, each feed roller 202 dispenses a print sheet from thecorresponding sheet cassette 201 accommodating print sheets and feeds itto the transfer roller 203. The transfer roller 203 causes the tonerimage on the photoconductive drum 204 to be transferred to the printsheet conveyed thereto, and the fixing roller 208 heats the transferredtoner image to fix it to the print sheet. Thereafter, the print sheet isbrought into the sheet post-processing unit 300 through the dischargeopening 209 of the main unit 200. Print sheets are also discharged ontothe discharge tray 210 according to needs.

The sheet post-processing unit 300 is provided with a load port 301, aprint-sheet conveying portion 302, an unload port 303, a stack tray 304and the like. The print-sheet conveying portion 302 successively conveysthe print sheets brought into the load opening 301 through the dischargeopening 209 and finally discharges the print sheets to the stack tray304 through the unload opening 303. The stack tray 304 is so constructedas to be vertically movable in directions of arrows according to thenumber of stacked print sheets discharged through the unload opening303.

FIG. 2 is a control block diagram of the composite apparatus shown inFIG. 1. The composite apparatus 1 is provided with a scanner section 11,an image processing section 21, a printer section 31, the operation unit400, a control unit 51, a network I/F (interface) portion 71, and an HDD(hard disk drive) 74.

The scanner section 11 includes an exposure lamp 12 and CCDs(charge-coupled devices) 13 constituting the scanner 501 shown inFIG. 1. The scanner section 11 is such that a document is irradiated bythe exposure lamp 12, a light reflected by the document is received bythe CCDs 13 to thereby read an image from the document, and an imagedata corresponding to the read image is outputted to the imageprocessing section 21.

The image processing section 21 includes a correcting device 22, animage processing device 23 and an image memory 24. The image processingsection 21 processes the read image data by means of the correctingdevice 22 and the image processing device 23 according to needs andsaves the processed image data in the image memory 24 or outputs it tothe printer section 31. The correcting device 22 applies specifiedcorrections such as a level correction and a γ-correction to the readimage data. The image processing device 23 applies various processingssuch as compression or expansion and enlargement or size-reduction tothe image data.

The printer section 31 includes a sheet conveying assembly 32constructed by the sheet cassettes 201, the feed rollers 202 and thelike shown in FIG. 1; an image forming assembly 33 constructed by thephotoconductive drum 204, the exposing device 206, the developing device207 and the like shown in FIG. 1; a transferring assembly 34 constructedby the transfer roller 203 and the like shown in FIG. 1; and a fixingassembly 35 constructed by the fixing roller 208 and the like shown inFIG. 1. The printer section 31 prints an image on a recording sheetusing an image data read by the scanner section 11. Specifically, thesheet conveying assembly 32 conveys a recording sheet to the imageforming assembly 33, the image forming assembly 33 forms a toner imagecorresponding to the above image data, the transferring assembly 34transfers the toner image to the recording sheet, and the fixingassembly 35 fixes the toner image to the recording sheet to print theimage.

The network I/F portion 71 controls various data transmission andreception to and from external apparatuses via a LAN using a networkinterface (10/100 Base-TX). The HDD 74 saves the image data read by thescanner section 11 and an output format set in the image data.

The operation unit 400 is provided with the display device 410, theoperation key assembly 430 and the like shown in FIG. 1. The displaydevice 410 is constructed by a touch panel unit obtained by combining atouch panel and an LCD or the like. The display device 410 displaysvarious operation screens and enables the operator to input commands toexecute various functions by touching a display surface (displayedoperation keys). The operation key assembly 430 includes the start key,the numeric pad and the like as described above.

The control unit 51 includes a CPU 52 and a display image data storage53. The CPU 52 governs the operation control of the composite apparatus1. The display image data storage 53 stores various still image data andmoving image data to be displayed on the display device 410.

The CPU 52 includes an operation controller 521, an error detector 522,a display controller 523 and a judging device 524. The operationcontroller 521 governs the operation control of the respect parts(scanner section 11, image processing section 21, printer section 31,etc.) of the composite apparatus 1. The error detector 522 detectsoperation errors of the respective parts during the operation of thecomposite apparatus 1. Operation errors include, for example, sheet jamsin a sheet conveyance path from the sheet cassettes 201 to the dischargetray 210, the document conveying portion 603 of the document feedingunit 600 and the like, and abnormal stops caused by the breakdown of theimage forming assembly 33, the transferring assembly 34, and the like.

The display controller 523 is for controlling the operation of thedisplay device 410. The display controller 523 causes the display device410 to display operation guiding screens for the operator. For example,the display controller 523 reads necessary moving image data from thedisplay image data storage 53 and reproduces them or reads necessarystill image data from the display image data storage 53 and displaysscreens showing an operation procedure of removing the operation errorin an animated manner (e.g. by continuously displaying a plurality ofstill images at the same position for animated display) if the operationerror has been detected by the error detector 522. The displaycontroller 523 also causes the display device 410 to display a guidescreen or the like used to receive the input of instructions on therespective functions such as a copy function and other screens.

The judging device 524 judges whether or not the operator has completedoperations to remove the operation error in accordance with signals andthe like from sensors provided in the respective parts of the compositeapparatus 1.

Next, a first embodiment of a screen display switching control of thedisplay device 410 in the event of an operation error in the compositeapparatus 1 is described. FIG. 3 is a flow chart showing the screendisplay switching control of the display device 410 in the event of anoperation error in the composite apparatus 1, FIG. 4 is a diagramshowing an example of a display screen showing that copying is inprocess, FIG. 5 is a diagram showing an example of a display screen inthe event of an operation error caused by a sheet jam, and FIG. 6 is atransition diagram of display screens of the display device 410.

In the composite apparatus 1, if the operation controller 521 is causingthe respective parts to perform operations in accordance with anoperation instruction or the like from the operator inputted in theoperation unit 400, e.g. if the operation controller 521 is causing thescanner section 11, the image processing section 21 and the printersection 31 to perform a copying operation, the display controller 523causes the display device 410 to display a display screen showing thatcopying is in process as shown in FIG. 4 (Step S1). Hereinafter,description is given, taking the case of the copying operation as anexample.

If the error detector 522 detects an operation error caused, forexample, by a sheet jam during the copying operation (YES in Step S2),the display controller 523 reads data, which are used to display theoperation procedure of removing the operation error caused by the sheetjam on the display device 410, from the display image data storage 53,reproduces the data and causes them to be displayed on the displaydevice 410 (Step S3). This operation procedure is comprised of aplurality of operations, and the data used to display the operationprocedure include data of display screens showing the plurality ofoperations.

At this time, the display controller 523 causes screens showing a seriesof operations constituting the operation procedure of removing theoperation error caused by the sheet jam to be switched in rotation anddisplayed on the display device 410 at intervals of specified periods,for example, as shown in (1) to (8) of FIG. 6. The display controller523 causes parts of the composite apparatus 1 shown in the respectivescreens to be displayed in an animated manner to the operator as if therespective parts of the composite apparatus 1 were moving.

For example, the display controller 523 causes the animated display of astate where a main unit cover is opened as shown in (2) of FIG. 6 andthe animated display of a state where a sheet is taken out from thecassette as shown in (5), (6) of FIG. 6, whereby the operator canvisually and inspirationally grasp operations needed to be performed toremove the operation error. It should be noted that the displaycontroller 523 repeats the displays from the one shown in (1) of FIG. 6upon finishing the display shown in (8) of FIG. 6. Thus, the operatorcan easily grasp the operations necessary to remove the sheet jam fromthe beginning to the end by seeing the display screens of the displaydevice 410.

Here, the screen of (1) in FIG. 6 to be first shown by the displaycontroller 523 is described in detail. As shown in FIG. 5, a sheet jamoccurring position (“a” in FIG. 5), the display controller 523 causesthe display device 410 to display the external appearance of thecomposite apparatus 1 at the present moment (“b” in FIG. 5) and thecharacter explanation of a series of operations to be performed by theoperator (“c” in FIG. 5). A part of the character explanation on theoperations representing an operation to be performed by the operator atthis moment is displayed by the display controller 523 in a formatdifferent from the other parts, for example, by shading. Further, thedisplay controller 523 causes all the operations constituting theoperation procedure necessary to remove the operation error caused bythe sheet jam to be displayed on the display screen (“d” in FIG. 5).

The display controller 523 causes the total number of the operations ofthe operation procedure for the removal of the operation error caused bythe sheet jam and the order of the presently displayed operation in allthe operations to be displayed on the respective screens. For example,if the total number of the operations of the operation procedure for theremoval of the operation error caused by the sheet jam is eight as inthis embodiment and the presently displayed operation is the firstoperation, the display controller 523 causes “01/08” to be displayed asshown in “e” of FIG. 5. By the presence of this display, the operatorcan easily recognize that there are eight operations to be performed forthe removal of the sheet jam and the first operation is presentlydisplayed on the screen by seeing the display screen of the displaydevice 410. The display format of the total number of the operations ofthe operation procedure for the removal of the operation error caused bythe sheet jam and the order of the presently displayed operation in allthe operations is not limited to a numerical display like “01/08” andmay be another display format. For example, the total number of theoperations of the operation procedure and the order of the presentlydisplayed operation in all the operations may be graphically displayed,for example, by means of images.

The display controller 523 causes a part of the displays of all theoperations (“d” in FIG. 5) corresponding to the screen displayed on thedisplay device 410 to be displayed differently from the preceding andsucceeding operations (Step S4) while causing the display device 410 todisplay the respective screens of (1) to (8) in FIG. 6. For example, thedisplay controller 523 causes the first one of the displays of all theoperations to be highlighted (may be displayed by shading or in adifferent color and the display format for causing the display to differfrom the other ones is not limited) when the first screen is displayedas shown in (1) of FIG. 6. In this way, the first display is made tostand out more than the other seven displays.

The display controller 523 performs the above display color changingprocess, for example, (1) by preparing two kinds of graphics showingscreens of the same content and having different colors and displayingthe corresponding screen as the operation is completed (display imagedata of different colors are stored in the display image data storage53), or (2) by rewriting a code for administering the color of thescreen and displaying the screen as the operation is completed (displaycontroller 523 processes and reproduces data read from the display imagedata storage 53).

The display controller 523 continues to cause the display device 410 toperform Steps S3 and S4 until the judging device 524 judges that all theoperations constituting the operation procedure have been completed bythe operator (NO in Step S5). If the judging device 524 judges that allthe operations constituting the operation procedure have been completedby the operator (YES in Step S5), the display controller 523 ends theabove display process on the display device 410.

By the display control as above, the operator can accurately grasp whichones of the plurality of operations constituting the operation procedureto remove the operation error have been completed, which operation ispresently performed and how many operations have to be performed tocomplete all the operations by looking at the parts “d” and “e” of FIG.5 and the like on the display screen of the display device 410. In aconventional composite apparatus, an operation guide for the removal ofthe operation error is displayed on a display device for an operator,but the respective operation guides are separately displayed on onescreen even when a plurality of operations have to be performed. Thus,it has been difficult for the operator to grasp the progress of theoperations for the removal of the operation error. However, according tothis embodiment, such a problem residing in the conventional compositeapparatus can be solved.

Next, a second embodiment of the screen display switching control of thedisplay device 410 in the event of an operation error in the compositeapparatus 1 is described. FIG. 7 is a flow chart showing the secondembodiment of the screen display switching control of the display device410 in the event of an operation error in the composite apparatus, andFIG. 8 is a transition diagram of display screens of the display device410. It should be noted that operations similar to those shown in FIG. 3are identified by the same reference numerals and are not described.

In the first embodiment shown in FIG. 3, the part of the display of allthe operations (see “d” in FIG. 5) corresponding to the screen displayedon the display device 410 is displayed differently from the displays ofthe preceding and succeeding operations when the respective screens of(1) to (8) of FIG. 6 are displayed on the display device 410 (Step S4 ofFIG. 3). However, in the second embodiment, the display controller 523obtains information as to whether or not the respective operations ofthe operation procedure have been completed from the judging device 524(Step S11), and causes parts of the display of all the operations (see“d” in FIG. 5) corresponding to the screens showing the operationsjudged to have been completed by the judging device 524 to be displayedin a color different from the other operation(s) (Step S12).

For example, when the judging device 524 judges that the operator openedthe main unit cover to take a sheet out in accordance with a guide “1.OPEN MAIN UNIT COVER AND TAKE SHEET OUT IF ANY” displayed on the displaydevice 410 (YES in Step S11), the display controller 523 causes thefirst to third displayed portions showing the operations alreadycompleted by the operator out of the display of all the operations (“d”in FIG. 5) to be shown in a color different from the fourth to eighthdisplays showing the other operations regardless of which screen isbeing displayed on the display device 410 as shown in (1) to (8) of FIG.8. Thus, the operator can recognize that the operations displayed in thedifferent color have been already completed by seeing the display screenof the display device 410, wherefore the operations already completedand those yet to be completed can be clearly distinguished. Further, theoperator can easily grasp the progress of the operations (whichoperations have been completed out of a series of operations necessaryto remove the operation error).

Next, a third embodiment of the screen display switching control of thedisplay device 410 in the event of an operation error in the compositeapparatus 1 is described. FIG. 9 is a flow chart showing the thirdembodiment of the screen display switching control of the display device410 in the event of an operation error, FIG. 10 is a diagram showing thetransition of display screens showing an operation procedure in theevent of an operation error caused by a sheet jam, and FIG. 11 is adiagram showing the transition of the display screens showing theoperation procedure in the event of the operation error caused by thesheet jam, wherein the display of the operations already completed ischanged in color. It should be noted that operations similar to those ofthe first or second embodiment are not described.

If the judging device 524 judges that one of a plurality of operationsconstituting the operation procedure has been completed by the operator(YES in Step S24) while the display controller 523 is causing thedisplay device 410 to display the respective screens showing theoperation procedure in the event of an error in Step S23, the displaycontroller 523 changes the color of the display screen showing theoperation completed by the operator (Step S25). For example, the displaycontroller 523 changes the display color of the screen showing thealready completed operation to sepia or the like and causes the displaydevice 410 to display the screen. At this time, the display screens (1)to (8) are repeatedly displayed in rotation by the display controller523 as shown in FIG. 10. After the color of the display screens (1) to(3) showing the operations already completed by the operator is changedto the one different from the display screens (4) to (8) showing theother operations, the display screens (1) to (8) are repeatedlydisplayed in rotation as shown in FIG. 11. Thus, the operator canrecognize that the operations displayed in the different color have beenalready completed by seeing the display screen of the display device410, wherefore the operations already completed and those yet to becompleted can be clearly distinguished. Further, the operator can easilygrasp the progress of the operations (which operations have beencompleted out of a series of operations necessary to remove theoperation error).

The process of changing the display color of the screen by the displaycontroller 523 is performed, for example, (1) by preparing two kinds ofgraphics showing screens of the same contents and having differentcolors and displaying the corresponding screen as the operation iscompleted (display image data of different colors are stored in thedisplay image data storage 53) or (2) by rewriting a code foradministering the color of the screen and displaying the screen as theoperation is completed (display controller 523 processes and reproducesdata read from the display image data storage 53).

The display controller 523 repeats the operations in Steps S23 to S25(Step S26) until the judging device 524 judges that all the operationsnecessary to remove the operation error caused by the sheet jam havebeen completed. For example, when the judging device 524 judges that theoperator opened the main unit cover to take a sheet out in accordancewith a guide “1. OPEN MAIN UNIT COVER AND TAKE SHEET OUT IF ANY” (seeFIG. 10) displayed on the display device 410, the display controller 523first causes the display screens (1) to (3) to be displayed in sepiadifferent from the display screens showing the other operations as shownin FIG. 11. Further, when the judging device 524 judges that theoperator completed an operation of pulling the cassette out to take asheet out in accordance with guides “2. PULL CASSETTE OUT” and “3. TAKESHEET OUT,” the display controller 523 causes the display device 410 todisplay the display screens (4) to (6) also in sepia, which is a colordifferent from that of the remaining display screens (7), (8).

Steps S23 to S25 are continued until the judging device 524 judges thatthe operator has completed all the operations constituting the operationprocedure (YES in Step S26). If the judging device 524 judges that theoperator has completed all the operations constituting the operationprocedure (NO in Step S26), the display controller 523 ends the process.In other words, the display controller 523 ends the animated display ofthe operation procedure on the display device 410.

Although the display controller 523 causes the display device 410 todisplay the display screens showing the operations completed by theoperator in the color (e.g. sepia) different from the one of the displayscreens showing the operations yet to be completed in this embodiment,the present invention is not limited thereto. Any other mode can beadopted provided that the display format of the operations alreadycompleted by the operator is different from that of the otheroperations. FIG. 12 is a diagram showing the transition of the displayscreens of the operation procedure in the event of an operation errorcaused by a sheet jam, wherein already completed operations aredisplayed in a different format. For example, the display controller 523may superimpose an image of “DONE” on the display screens showing theoperations already completed by the operator as shown in FIG. 12 so thatthese display screens have a display format different from those showingthe operations yet to be completed. This process of changing the screendisplay by the display controller 523 is similar to the above process ofchanging the screen display color by the display controller 523.

Next, a fourth embodiment of the screen display switching control of thedisplay device 410 in the event of an operation error in the compositeapparatus 1 is described. FIG. 13 is a flow chart showing the fourthembodiment of the screen display switching control of the display device410 in the event of an operation error, and FIG. 14 is a diagram showingthe transition of display screens showing an operation procedure in theevent of an operation error caused by a sheet jam, wherein operationsalready completed are displayed in a different format. It should benoted that operations in FIG. 13 similar to those of the thirdembodiment shown in FIG. 9 are identified by the same reference numeralsand not described.

In the screen display switching control of the third embodiment shown inFIG. 9, the color of the display screens showing the operations alreadycompleted by the operator is changed. In addition, the displaycontroller 523 may cause the display device 410 to display the displayscreens showing the operations already completed by the operator afterdeleting the displays that became unnecessary to guide the operator(Step S31).

In this case, the display controller 523 causes the display device 410to display the display screens (1) to (6) in a color (e.g. sepia)different from that of the remaining display screens (7), (8) (Step S25)and an animated display showing a state where a sheet is taken out fromthe cassette is deleted (the animated display showing the state where asheet is taken out from the cassette is not made) particularly in thedisplay screens (5), (6) as shown in FIG. 14, for example, if thejudging device 524 judges that the operator has completed an operationof pulling the cassette out and taking a sheet out in accordance withguides “2. PULL CASSETTE OUT.” and “3. TAKE SHEET OUT”. The operatoralready completed the operation of taking the sheet out from thecassette and it is not necessary to give the operation guide to theoperator by this display at this point of time. Thus, the displaycontent is simplified by not displaying the unnecessary operation guide,whereby the operator can more easily grasp operations still needed to beperformed.

The process of changing the screen display by the display controller 523is performed, for example, (1) by preparing graphics for screen displayscorresponding to the display contents and the respective graphics areused depending on whether or not the operation has been completed or (2)by rewriting a code for administering the color of the screen and thedisplay content and displaying the screen as the operation has beencompleted.

Next, fifth to eighth embodiments of the screen display switchingcontrol of a display device 410 in the event of an operation error in acomposite apparatus 1 are described. FIG. 15 is a control block diagramof a composite apparatus 1 executing the screen display switchingcontrols of the fifth to eighth embodiments. It should be noted that thesame construction as in the composite apparatus 1 shown in FIG. 2 arenot described.

A display device 410 of an operation unit 400 is provided with a frameadvance key 411, a frame rewind key 413 and a pause key 412 (instructionreceiving portion). The frame advance key 411 receives an instruction toswitch the display screen of the display device 410 to a next screen.The pause key 412 receives an instruction to pause the display screen ofthe display device 410 to obtain a still image and an instruction tocancel the pause of the display screen. The frame rewind key 413receives an instruction to switch the display screen of the displaydevice 410 to one preceding screen. Images of the frame advance key 411,the frame rewind key 413 and the pause key 412 are displayed on thedisplay device 410 by a display controller 523.

Next, the fifth embodiment of the screen display switching control ofthe display device 410 in the event of an operation error in thecomposite apparatus 1 is described. FIG. 16 is a flow chart showing thefifth embodiment of the screen display switching control of the displaydevice 410 in the event of an operation error, FIG. 17 is a diagramshowing the transition of display screens showing an operation procedurein the event of an operation error caused by a sheet jam, and FIG. 18 isa diagram showing a display example of detailed explanation. It shouldbe noted that operations similar to those of the first to fourthembodiments are not described.

If an error detector 522 detects an operation error, for example, causedby a sheet jam during a copying operation (YES in Step S52), the displaycontroller 523 reads data corresponding to an operation procedurenecessary to remove the operation error caused by the sheet jam from adisplay image data storage 53 and reproduces them, thereby causing thedisplay device 410 to display this operation procedure (Step S53). Atthis time, the display controller 523 causes the display device 410 torepeatedly display screens showing a series of operations constitutingthe operation procedure of removing the operation error caused by thesheet jam in rotation at a predetermined speed, for example, as shown in(1) to (8) of FIG. 17, wherein images of the frame advance key 411, theframe rewind key 413 and the pause key 412 are displayed in each screen.

If the operator operates the frame advance key 411, the pause key 412 orthe frame rewind key 413 (YES in Step S54) while the display controller523 is causing the display device 410 to display the respective displayscreens of the operation procedure in Step S53, the display controller523 performs the following process.

If the operator presses the frame advance key 411 down (“FRAME ADVANCEKEY” in Step S55), the display controller 523 causes the screensucceeding the one being displayed at this moment to be displayed (StepS59) and resumes the repeated display of the respective screens showinga series of operations constituting the operation procedure from a statewhere this succeeding screen is displayed (Step S57). For example, thedisplay controller 523 causes the display device 410 to display thescreen shown in (6) of FIG. 17 if the operator presses the frame advancekey 411 down while the screen shown in (5) of FIG. 17 is displayed onthe display device 410. Then, the display controller 523 causes therespective screens to be repeatedly displayed in rotation from a statewhere the screen shown in (6) of FIG. 17 is displayed on the displaydevice 410.

Further, if the operator presses the frame rewind key 413 down (“FRAMEREWIND KEY” in Step S55), the display controller 523 causes the screenpreceding the one being displayed at this moment by one frame to bedisplayed (Step S56) and resumes the repeated display of the respectivescreens showing a series of operations constituting the operationprocedure from a state where this preceding screen is displayed (StepS57). For example, the display controller 523 causes the display device410 to display the screen shown in (4) of FIG. 17 if the operatorpresses the frame rewind key 413 down while the screen shown in (5) ofFIG. 17 is displayed on the display device 410. Then, the displaycontroller 523 causes the respective screens to be repeatedly displayedin rotation from a state where the screen shown in (4) of FIG. 17 isdisplayed on the display device 410.

Further, if the operator presses the pause key 412 down (“PAUSE KEY” inStep S55), the display controller 523 specifies an operation guided bythe screen displayed on the display device 410 at this moment, reads thedisplay data of detailed explanation corresponding to this operationfrom the display image data storage 53 and causes the display device 410to display the read data (Step S60). For example, the display controller523 reads the data of detailed explanation corresponding to theoperation (operation indicated by a guide “OPEN MAIN UNIT COVER AND TAKESHEET OUT IF ANY”, i.e. operation of opening the main unit cover andtaking a sheet out) guided by this display screen from the display imagedata storage 53 and causes the display device 410 to display a screen asshown in FIG. 18 if the operator presses the pause key 412 down whilethe screen shown in (3) of FIG. 17 is displayed on the display device410. On this display screen of the detailed explanation, a BACK button414 (utilizing a touch sensor function) used to input an instruction toreturn the display on the display device 410 to the initial animateddisplay for guiding the operation procedure is displayed by the displaycontroller 523.

If the BACK button 414 is pressed down by the operator (YES in Step S61)while the display controller 523 is causing the display device 410 todisplay the detailed explanation as described above, the displaycontroller 523 causes the display screen displayed when the pause key412 was pressed down by the operator in Step S55 to be displaced againon the display device (Step S64) and the repeated display of therespective screens showing a series of operations constituting theoperation procedure is resumed from this display screen (Step S57).

Unless the BACK button 414 is pressed down by the operator (NO in StepS61), the display controller 523 causes the display device 410 todisplay the above detailed explanation until the judging device 524judges that the operation guided by this detailed explanation has beencompleted (NO in Step S62, Step S60). If the judging device 524 judgesthat the operation guided by this detailed explanation has beencompleted (YES in Step S62), the display controller 523 causes thescreen showing the operation succeeding the one judged to have beencompleted to be displayed (Step S63) and resumes the repeated display ofthe respective screens showing a series of operations constituting theoperation procedure (Step S57). For example, if it is assumed that theoperation of the operator to open the main unit cover and take a sheetout is guided by the screen of the detailed explanation shown in FIG. 18(screen of the detailed explanation corresponding to the screens of (1)to (3) in FIG. 17) and the completion of this operation is judged by thejudging device 524 at this time, the display controller 523 causes thedisplay device 410 to display the screen of (4) in FIG. 17 showing theoperation succeeding the completed one.

In this control, the display controller 523 causes the screen showingthe operation succeeding the one judged to have been completed to bedisplayed (Step S63) if the judging device 524 judges that the operationguided by the detailed explanation has been completed as described above(YES in Step S62). However, the display controller 523 may resume therepeated display of the respective screens showing a series ofoperations constituting the operation procedure from the first screenshowing the operation procedure instead of the operation in Step S63.

The repeated display of the respective screens showing a series ofoperations constituting the operation procedure by the displaycontroller 523 is continued until the judging device 524 judges thecompletion of all the operations necessary to remove the operation errorby this operation procedure (YES in Step S58), and the displaycontroller 523 ends the process when the judging device 524 judges thecompletion of all the operations necessary to remove the operation errorby this operation procedure (NO in Step S58). In other words, thedisplay controller 523 ends the animated display of the operationprocedure on the display device 410.

In this way, the operator can obtain further information on theoperation being displayed since the detailed explanation on theoperation guided by the display screen of the display device 410 isdisplayed on the display device 410 if the pause key 412 is presseddown. The understanding of this operation can be deepened. If theoperator completes the operation guided by this detailed explanationduring the display of the detailed explanation, the screen showing theoperation succeeding the completed one is displayed on the displaydevice 410, wherefore the operator can immediately recognize theoperation to be performed next.

Next, the sixth embodiment of the screen display switching control ofthe display device 410 in the event of an operation error in thecomposite apparatus 1 is described with reference to FIG. 19 as well asFIG. 17. FIG. 19 is a flow chart showing the sixth embodiment of thescreen display switching control of the display device 410 in the eventof an operation error. It should be noted that operations in FIG. 19similar to those of the fifth embodiment shown in FIG. 16 are identifiedby the same reference numerals and not described.

In this sixth embodiment, if the pause key 412 is pressed down by theoperator while the display controller 523 is causing the display device410 to display the moving images of the operation procedure (YES in StepS54, “PAUSE KEY” in Step S55), the display controller 523 detectswhether this operation is judged to have been completed or not to havebeen completed yet by the judging device 524. The display controller 523causes the display device 410 to display the detailed description on theoperation not completed yet (S60), only if the operation is judged notto have been completed yet (NO in Step S71).

If the pause key 412 is pressed down by the operator while the displaycontroller 523 is causing the display device 410 to display the movingimages of the operation procedure, but the operation guided by thedisplay screen at this moment is judged to have been completed by thejudging device 524 (YES in Step S71), the display controller 523 causesthe screen at this moment to pause and to be displayed on the displaydevice 410 (Step S72). For example, the display controller 523 causesthe screen of (5) in FIG. 17 to pause and to be displayed on the displaydevice 410 while causing the display device 410 to display the screenshown in (5) of FIG. 17. It should be noted that the display controller523 causes a replay key (utilizing a touch sensor function) to bedisplayed on this paused screen. The replay key cancels the paused stateto receive an instruction to resume the repeated display of therespective screens showing a series of operations constituting theoperation procedure.

If the replay key is pressed down by the operator (YES in Step S73)while the display controller 523 is causing the display of the displaydevice 410 to pause, the display controller 523 resumes the repeateddisplay of the respective screens showing a series of operationsconstituting the operation procedure from this paused screen (Step S74).Unless the replay key is pressed down by the operator (NO in Step S73),the display controller 523 continues the display of the screen paused inStep S72 until the judging device 524 judges the completion of all theoperations necessary to remove the operation error by this operationprocedure (YES in Step S75) and ends the process when the judging device524 judges the completion of all the operations necessary to remove theoperation error by this operation procedure (NO in Step S75).

According to this control, the display controller 523 does not cause thedisplay device 410 to display the detailed explanation on the operationalready completed and unnecessary to be performed by the operator evenif the operator presses the pause key 412 down. Therefore, the operatorneeds not read the detailed explanation for unnecessary operations.

Next, the seventh embodiment of the screen display switching control ofthe display device 410 in the event of an operation error in thecomposite apparatus 1 is described with reference to FIG. 20 as well asFIG. 17. FIG. 20 is a flow chart showing the seventh embodiment of thescreen display switching control of the display device 410 in the eventof an operation error. It should be noted that operations similar tothose of the first to sixth embodiments are not described.

In the seventh embodiment, if an instruction to switch the displayscreen of the display device 410 (hereinafter, “display switchinginstruction”) is received by the frame advance key 411, the pause key412 or the frame rewind key 413 through an operation by the operatorwhile the display controller 523 is causing the display device 410 todisplay the above moving images, the display controller 523 performs thefollowing process in accordance with the content of this displayswitching instruction.

If the frame rewind key 413 receives an instruction to switch thedisplay screen of the display device 410 to the first preceding screen(“FRAME REWIND KEY” in Step S85), the display controller 523 switchesthe screen being displayed at this moment to the first preceding screenand causes the screen after the switch to pause and to be displayed as astill image on the display device 410 (Step S86). For example, if theframe rewind key 413 receives the above instruction from the operatorwhile the display controller 523 is causing the display device 410 todisplay the screen shown in (5) of FIG. 17, the display controller 523cause the display device 410 to display the screen shown in (4) of FIG.17 and cause the display to pause in this state. Although the displaycontroller 523 causes the screen switch to pause at this screen, theanimated display on this screen may not pause (same holds for Steps S90to S92).

Further, if the frame advance key 411 receives an instruction to switchthe display screen of the display device 410 to the first succeedingscreen (screen advanced by one frame) (“FRAME ADVANCE KEY” in Step S85),the display controller 523 switches the screen being displayed at thismoment to the first succeeding screen (next screen) and causes thescreen after the switch to pause and to be displayed as a still image onthe display device 410 (Step S90). For example, if the frame advance key411 receives the above instruction from the operator while the displaycontroller 523 is causing the display device 410 to display the screenshown in (5) of FIG. 17, the display controller 523 causes the displaydevice 410 to display the screen shown in (6) of FIG. 17 and causes thedisplay to pause in this state.

Further, if the pause key 412 receives an instruction to pause thedisplay screen of the display device 410 (“PAUSE KEY” in Step S85), thedisplay controller 523 causes the screen being displayed at this momentto pause and to be displayed as a still image on the display device 410(Step S91). For example, if the pause key 412 receives the aboveinstruction from the operator while the display controller 523 iscausing the display device 410 to display the screen shown in (5) ofFIG. 17, the display controller 523 causes the display device 410 topause at the screen shown in (5) of FIG. 17 being displayed at thismoment.

If an instruction to cancel the paused display is received through theoperation of the pause key 412 by the operator while the displaycontroller 523 is causing the display of the display device 410 to pauseby any one of the above processings (YES in Step S87), the displaycontroller 523 resumes the repeated display of the respective screensshowing a series of operations constituting the operation procedure fromthis paused screen (Step S92). Thereafter, this process returns to StepS84.

If the judging device 524 judges that the operation guided by thedisplay device 410 has been completed by the operator (YES in Step S88)although no instruction to cancel the paused display has been received(NO in Step S87) while the display controller 523 is causing the displayof the display device 410 to pause as described above, the displaycontroller 523 resumes the repeated display of the respective screensshowing a series of operations constituting the operation procedure fromthis paused screen (Step S92) if the judging device 524 judges that allthe operations necessary to remove the operation error caused by thesheet jam have not been completed yet (YES in Step S89). Thereafter,this process returns to Step S84. It should be noted that the displaycontroller 523 ends this process if the judging device 524 judges thatthe operation guided by the display device 410 has been completed by theoperator (YES in Step S88) and that all the operations necessary toremove the operation error caused by the sheet jam have been completed(NO in Step S89). In other words, the display controller 523 ends theanimated display of the operation procedure on the display device 410.

In this way, only by pressing the frame advance key 411 or the framerewind key 413 down, the operator can cause the screen different fromthe one being displayed at this moment to be displayed as a still imageon the display device 410. Thus, the operator can confirm for a longtime by switching the screen being displayed to another screen through asimple operation.

Next, the eighth embodiment of the screen display switching control ofthe display device 410 in the event of an operation error in thecomposite apparatus 1 is described with reference to FIG. 21 as well asFIG. 17. FIG. 21 is a flow chart showing the eighth embodiment of thescreen display switching control of the display device 410 in the eventof an operation error. It should be noted that operations similar tothose of the seventh embodiment are identified by the same referencenumerals and not described.

In the eighth embodiment, the display device 410 includes a restart key(not shown) in addition to the frame advance key 411, the pause key 412and the frame rewind key 413 by the display control of the displaycontroller 523. The restart key is for receiving an instruction to causethe display device 410 to display the first screen (screen showing thefirst one of a series of operations to remove the operation error) ofthe operation procedure. In other words, the restart key employing atouch panel function is further displayed on the display screen of thedisplay device 410, and receives the instruction to cause the displaydevice 410 to display the first screen upon being pressed down by theoperator.

If the restart key receives the instruction to switch the screen displayof the display device 410 to the first screen through the operation ofthe operator (YES in Step S84, “RESTART KEY” in Step S85) while thedisplay controller 523 is causing the display device 410 to display theoperation procedure of removing the operation error (Step S83), thedisplay controller 523 switches the screen being displayed at thismoment to the first screen and further causes the screen after theswitch to pause and to be displayed as a still image on the displaydevice 410 (Step S95). For example, if the restart key receives theabove instruction from the operator while the display controller 523 iscausing the display device 410 to display any one of the screens shownin (2) to (8) of FIG. 17, the display controller 523 causes the firstscreen shown in (1) of FIG. 17 to be displayed and cause the display topause in this state.

Thus, the operator can confirm this first screen for a long time bycausing the display device 410 to display the first screen of theoperation procedure through a simple operation.

In the seventh and eighth embodiments, the display controller 523switches the display screen of the display device 410 to the firstsucceeding or preceding screen and causes the screen after the switch topause and to be displayed on the display device 410 if the frame advancekey 411 or the frame rewind key 413 receives the display switchinginstruction. However, the display controller 523 may advance or rewindthe display screen of the display device 410 by two or more frames andcauses the resulting screen to pause.

In the seventh and eighth embodiments, the display controller 523 causesthe screen after the switch to pause and to be displayed on the displaydevice 410 if the frame advance key 411 or the frame rewind key 413receives the display switching instruction. However, the displaycontroller 523 may, instead, enable the operator to confirm the screenafter the switch by eye by setting a speed at which the screen after theswitch is switched to a next new screen slower than a speed at which thedisplay controller 523 switches the respective screens in rotation whenno display switching instruction is received by the frame advance key411 or the frame rewind key 413.

Next, a ninth embodiment of the screen display switching control of adisplay device 410 in the event of an operation error in a compositeapparatus 1 is described. FIG. 22 is a control block diagram of thecomposite apparatus 1 executing the screen display switching control ofthe ninth embodiment. It should be noted that the same construction asin the composite apparatus 1 shown in FIG. 2 or 15 are not described.

A CPU 52 of the composite apparatus 1 is provided with a display screendiscriminator 525 in addition to an operation controller 521, an errordetector 522, a display controller 523 and a judging device 524.

The display screen discriminator (display screen discriminating portion)525 discriminates an instruction inputted by an operator in accordancewith an operation mode of a frame advance key 411 or a frame rewind key413 adopted by the operator, and discriminates a display screen on thedisplay device 410 indicated by the discriminated instruction. Forexample, the display screen discriminator 525 discriminates whether aframe advance key 411 or a frame rewind key 413 was pressed down in apredetermined mode, e.g. pressed down for a shorter period (e.g. shorterthan 1 sec.: same below) or pressed down for a longer period (e.g. 1 toseveral sec.: same below), discriminates the instruction from theoperator based on this discrimination result, and discriminates thescreen to be displayed on the display device 410 based on thisdiscriminated instruction. For example, the display controller 523discriminates the instruction from the operator and the display screenindicated by this instruction such as follows: (1) discriminates thescreen succeeding the one being displayed when the frame advance key 411is pressed down for a shorter period; (2) discriminates the screenshowing the operation (operation to be performed next by the operator)succeeding the one already completed by the operator out of theoperation procedure being displayed if the frame advance key 411 ispressed down for a longer period; (3) discriminates the screen precedingthe one being displayed when the frame rewind key 413 is pressed downfor a shorter period; and (4) discriminates the first screen of theoperation procedure being displayed (screen showing the first operationout of a series of operations to remove the operation error) if theframe rewind key 413 is pressed down for a longer period.

Next, the ninth embodiment of the screen display switching control ofthe display device 410 in the event of an operation error is describedwith reference to FIG. 23 as well as FIG. 17. FIG. 23 is a flow chartshowing the ninth embodiment of the screen display switching control ofthe display device 410 in the event of an operation error. It should benoted that operations similar to those of the first to eighthembodiments are not described.

In this ninth embodiment, the display controller 523 performs thefollowing process if the operator operates the frame advance key 411,the pause key 412 or the frame rewind key 413 (YES in Step S104) whilethe display controller 523 is causing the display device 410 to displaythe above moving images.

If the operator has pressed the frame advance key 411 down (“FRAMEADVANCE KEY” in Step S105), the display screen discriminator 525discriminates whether the operator has pressed for a shorter period orfor a longer period (Step S110). If discriminating that the operator haspressed for a shorter period (NO in Step S110), the display screendiscriminator 525 discriminates the screen succeeding the one beingdisplayed at this moment as the screen to be displayed on the displaydevice 410 (Step S111). The display controller 523 resumes the repeateddisplay of the respective screens showing a series of operationsconstituting the operation procedure from this discriminated screen(succeeding screen) (Step S108). For example, if the frame advance key411 is pressed down for a shorter period by the operator while thescreen shown in (5) of FIG. 17 is being displayed on the display device410, the display controller 523 causes the display device 410 to displaythe screen shown in (6) of FIG. 17. The display controller 523repeatedly displays the respective screens in rotation from the statewhere the screen in (6) of FIG. 17 is displayed on the display device410.

On the other hand, if discriminating that the operator has pressed for alonger period (YES in Step S110), the display screen discriminator 525discriminates the operation already completed by the operator based on ajudgment result of the judging device 524 and discriminates the screenshowing the operation succeeding this completed operation as the screento be displayed on the display device 410 (Step S112). The displaycontroller 523 resumes the repeated display of the respective screensshowing a series of operations constituting the operation procedure fromthis discriminated screen (Step S108). For example, if the frame advancekey 411 is pressed down for a longer period by the operator and theoperation guided by “1. OPEN MAIN UNIT COVER AND TAKE SHEET OUT IF ANY”displayed on the display device 410, i.e. the operation of the operatorto open the main unit cover and to take a sheet out is judged to havebeen completed by the judging device 524 while the screen shown in (1)of FIG. 17 is being displayed on the display device 410, the displaycontroller 523 causes the display device 410 to display the screen shownin (4) of FIG. 17 showing the operation succeeding this completedoperation. The display controller 523 repeatedly displays the respectivescreens in rotation from the state where the screen in (4) of FIG. 17 isdisplayed on the display device 410.

If the operator has pressed the frame rewind key 413 down (“FRAME REWINDKEY” in Step S105), the display screen discriminator 525 discriminateswhether the operator has pressed for a shorter period or for a longerperiod (Step S106). If discriminating that the operator has pressed fora shorter period (NO in Step S106), the display screen discriminator 525discriminates the first preceding screen of the one being displayed atthis moment as the screen to be displayed on the display device 410(Step S113). The display controller 523 resumes the repeated display ofthe respective screens showing a series of operations constituting theoperation procedure from this discriminated screen (first precedingscreen) (Step S108). For example, if the frame rewind key 413 is presseddown for a shorter period by the operator while the screen shown in (5)of FIG. 17 is being displayed on the display device 410, the displaycontroller 523 causes the display device 410 to display the screen shownin (4) of FIG. 17. The display controller 523 repeatedly displays therespective screens in rotation from the state where the screen in (4) ofFIG. 17 is displayed on the display device 410.

On the other hand, if discriminating that the operator has pressed for alonger period (YES in Step S106), the display screen discriminator 525discriminates the first screen of the operation procedure beingdisplayed as the screen to be displayed on the display device 410 (StepS107). The display controller 523 resumes the repeated display of therespective screens showing a series of operations constituting theoperation procedure from this discriminated screen (first screen) (StepS108). For example, if the frame rewind key 413 is pressed down for alonger period by the operator while the screen shown in (7) of FIG. 17is being displayed on the display device 410, the display controller 523causes the display device 410 to display the first screen shown in (1)of FIG. 17. The display controller 523 repeatedly displays therespective screens in rotation from the state where the screen in (1) ofFIG. 17 is displayed on the display device 410.

If the operator has pressed the pause key 412 (“PAUSE KEY” in StepS105), the display controller 523 causes the screen being displayed atthis moment to pause (i.e. the display screen is not switched to anotherscreen showing another operation) and to be displayed as a still imageon the display device 410 (Step S114). For example, if the pause key 412is pressed down by the operator while the display controller 523 iscausing the display device 410 to display the screen shown in (5) ofFIG. 17, the display controller 523 causes the screen shown in (5) ofFIG. 17 being displayed at this moment to pause and to be displayed onthe display device 410. If the pause key 412 is pressed down again bythe operator (YES in Step S115) while the display controller 523 iscausing the display of the display device 410 to pause in this way, thedisplay controller 523 resumes the repeated display of the respectivescreens showing a series of operations constituting the operationprocedure from this paused screen (Step S116).

Unless the pause key 412 is pressed down again by the operator (NO inStep S115), the display controller 523 keeps the paused state until thejudging device 524 judges that all the operations necessary to removethe operation error by this operation procedure have been completed (YESin Step S117). The display controller 523 ends this process if thejudging device 524 judges that all the operations have been completed(NO in Step S117).

The repeated display of the respective screens showing a series ofoperations constituting the operation procedure by the displaycontroller 523 (Step S108) is continued until the judging device 524judges that all the operations necessary to remove the operation errorby this operation procedure have been completed (YES in Step S109), andthe display controller 523 ends this process when the judging device 524judges that all the operations have been completed (NO in Step S109). Inother words, the display controller 523 ends the animated display of theoperation procedure on the display device 410.

In this way, the operator can input the instruction to switch to acorresponding different display screen by pressing the frame advance key411 or the frame rewind key 413 either for a shorter period or for alonger period. Thus, when the operator carries out an operation inaccordance with the operation guide displayed on the display device 410,the display screen of the display device 410 can be immediately switchedto a desired screen with a simple operation. Further, many instructionscan be received from the operator even without increasing the number ofkeys displayed on the display device 410, and the display controller 523can cause the display device 410 to display screens in conformity withthe respective instructions.

In the ninth embodiment, the display device 410 is provided with theframe advance key 411 and the frame rewind key 413 and the displaycontroller 523 executes such a control as to differ the screen to bedisplayed on the display device 410 depending on whether these keys arepressed down for a shorter period or for a longer period. However, theoperation mode is not limited to the one in which the keys are presseddown for a shorter period or for a longer period, the keys provided onthe display device 410 are note limited to the frame advance key 411 andthe frame rewind key 413 and the number of the keys provided on thedisplay device 410 is not limited to two. For example, a single key maybe provided on the display device 410 instead of the frame advance key411 and the frame rewind key 413, and the screen caused to be displayedon the display device 410 by the display controller 523 may be madedifferent in accordance with the operation mode of this single key (e.g.the duration of one press-down operation, the number of press-downoperations of the key within a specified period, etc.).

Further in the ninth embodiment, the display controller 523 causes thedisplay device 410 to display the screen showing the operationsucceeding the already completed operation if the frame advance key 411has been pressed down for a longer period by the operator, and causesthe display device 410 to display the first screen of the operationprocedure if the frame rewind key 413 has been pressed down for a longerperiod by the operator. However, the screens displayed by the switch inaccordance with the operation mode of the frame advance key 411 or theframe rewind key 413 adopted by the operator are not limited to theabove screens, and the display controller 523 may switch the displayscreen to other screens in accordance with the operation mode of theframe advance key 411 or the frame rewind key 413.

It should be appreciated that the present invention is not limited tothe constructions of the foregoing respective embodiments and variousmodifications can be made. For example, the screen display switchingcontrol in the case where the display controller 523 causes theoperation procedure of removing the operation error caused by the sheetjam is described as an example in the foregoing respective embodiments.However, the present invention is, of course, also applicable to ascreen display switching control in the case where the displaycontroller 523 causes an operation procedure of removing an abnormalstop caused by the breakdown of the image forming assembly 33, thetransferring assembly 34 or the like. Further, the operation procedureis not limited to the one for the removal of an operation error and thepresent invention is also applicable to the case where the displaycontroller 523 causes the display device 410 to display an operationprocedure of guiding another operation (e.g. how to replenish the sheetcassette with sheets).

Although the construction and the process of the composite apparatus 1are shown in FIGS. 1 to 23 in the foregoing respective embodiments,these are merely examples and the construction and the process of thecomposite apparatus 1 according to the present invention are not limitedto these.

Although the image forming apparatus according to the present inventionis described as the composite apparatus 1 in the foregoing respectiveembodiments, it is not limited to a composite apparatus.

To sum up, the present invention is directed to an image formingapparatus comprising display portion for displaying an operation guideto an operator, and display controller for causing the display portionto display an operation procedure comprised of a plurality of operationsas the operation guide while automatically switching the respectiveoperations in rotation.

According to the present invention, since the display controller causesthe display portion to display the operation procedure comprised of theplurality of operations as the operation guide while automaticallyswitching the respective operations in rotation, the operator can graspan operation next to the one being displayed on the display portionwithout being forced to switch a display screen.

In the present invention, the display controller causes the displayportion to display the stage of the operation being displayed in theoperation procedure when the display screens of the respectiveoperations constituting the operation procedure are displayed.

According to this invention, the operator can easily grasp the progressof the operations by confirming the displayed stage by eye since thestage of the operation being displayed in the operation procedure isalso displayed when the operation procedure comprised of the pluralityof operations is displayed operation by operation in rotation on thedisplay portion.

In the present invention, the display controller causes the stage of theoperation being displayed in the operation procedure to be displayed bycausing the display of the number of all the operations constituting theoperation procedure and the order of the predetermined operation to beperformed at the present moment by the operator in all the operations.

According to this invention, the operator can easily understand how farall the operations have been completed while carrying out a series ofoperations in accordance with the operation procedure, and can alsograsp how many operations have been completed up to the present moment,how many operations have to be performed yet to remove an error or thelike, therefore being able to precisely understand the progress of theoperations.

In the present invention, the display controller causes all theoperations constituting the operation procedure to be displayed andcauses the predetermined operation to be performed at the present momentby the operator to be displayed differently from the preceding andsucceeding operations when the respective operations constituting theoperation procedure are displayed.

According to this invention, the operator can specifically grasp thenumber of all the operations and can precisely understand whichoperation is being presently performed when carrying out a series ofoperations in accordance with the operation procedure.

In the present invention, judging portion for judging whether or not therespective operations constituting the operation procedure have beencompleted by the operator is further provided, and the displaycontroller causes all the operations constituting the operationprocedure to be displayed and causes the operation judged to have beencompleted by the judging portion to be displayed differently from theother operations when the respective operations constituting theoperation procedure are displayed.

According to this invention, the operator can recognize that theoperation displayed differently from the others was already completed byseeing the display of the display portion. Thus, the operator canclearly distinguish the operations already completed and those yet to becompleted. Further, the operator can easily grasp the progress of theoperations (up to which stage a series of operations necessary to removethe operation error have been completed).

In the present invention, judging portion for judging whether or not therespective operations constituting the operation procedure have beencompleted by the operator is further provided, and the displaycontroller causes the display portion to display the operation guide byrepeatedly reproducing the display screens of the respective operationsconstituting the operation procedure in rotation after changing thedisplay format of the display screen showing the operation judged tohave been completed by the judging portion to the one different fromthat of the other operations.

According to this invention, the operator can easily recognize that theoperation displayed in the different format is the already completedoperation. Thus, the operator can clearly distinguish the operationsalready completed and those yet to be completed and, further, can easilygrasp the progress of the operations.

In the present invention, the display controller causes the displayportion to display the operation guide by repeatedly reproducing thedisplay screens of the respective operations constituting the operationprocedure in rotation after causing the display format of the displayscreen showing the operation judged to have been completed by thejudging portion to differ from that of the display screens of the otheroperations and deleting a display portion that became unnecessary forthe guidance of the operator upon the completion of the operation.

According to this invention, the display of the display portion can besimplified and the operator can more easily grasp the operations neededto be performed yet since the display having become unnecessary for theoperator to see is not made.

In the present invention, instruction receiving portion for receiving aninstruction to pause the display screen of the display portion from theoperator is further provided, and the display controller causes thedisplay portion to display the operation guide by repeatedly reproducingthe plurality of screens constituting the operation procedure at apredetermined speed in rotation, and causes the display portion todisplay the detailed explanation of the operation guided on the screenbeing displayed when a pause instruction is received if the pauseinstruction from the operator is received by the instruction receivingportion.

According to this invention, the operator can obtain further informationon this operation to deepen the understanding of this operation sincethe detailed explanation of the operation guided on the display screenis displayed when the pause instruction from the operator is received.

In the present invention, judging portion for judging whether or not therespective operations guided by the operation guide have been completedby the operator is further provided, and the display controller resumesthe repeated reproduction of the respective screens constituting theoperation procedure if the operation guided on the screen beingdisplayed is judged to have been completed by the judging portion whenthe detailed explanation is displayed on the display portion.

According to this invention, only if the operator finishes the operationto be performed for the removal of the operation error, the detailedexplanation of the operation being displayed ends and the reproductionof the respective screens constituting the operation procedure resumes.Thus, the operator needs not see the screen having become unnecessary tosee and can go on to the confirmation of the respective screensconstituting the operation procedure.

In the present invention, the display controller resumes the repeatedreproduction of the respective screens constituting the operationprocedure from the screen showing the operation succeeding the onejudged to have been completed if the operation guided on the screenbeing displayed is judged to have been completed by the judging portionwhen the detailed explanation is displayed on the display portion.

According to this invention, only if the operator finishes the operationto be performed for the removal of the operation error while thedetailed explanation is being displayed, he can confirm each screen ofthe operation procedure by eye from the screen showing the operationsucceeding the completed one, therefore being able to immediatelyconfirm the operation to be performed next.

In the present invention, judging portion for judging whether or not therespective operations guided by the operation guide have been completedby the operator is further provided, and the display controller causesthe display portion to display the detailed explanation on the operationguided on the screen being displayed if the pause instruction from theoperator is received by the instruction receiving portion and theoperation guided on the screen being displayed is judged not to havebeen completed by the judging portion.

According to this invention, unless the operation guided on the displayscreen at this moment has not been completed yet even though the pauseinstruction from the operator is received by the instruction receivingportion, the detailed explanation on this operation is not displayed.Thus, the operator can be prevented from seeing the display screenshowing the detailed explanation unnecessary to see.

In the present invention, the display controller causes the screen beingdisplayed to pause and to be displayed on the display portion withoutdisplaying the detailed explanation of the operation guided on thescreen being displayed if the pause instruction from the operator isreceived by the instruction receiving portion and the operation guidedon the screen being displayed is judged to have been completed by thejudging portion.

According to this invention, unless the operation guided on the displayscreen at this moment is yet to be completed even although the pauseinstruction from the operator is received by the instruction receivingportion, the detailed explanation on this operation is not displayed andonly the display screen at this moment is caused to pause. Thus, theoperator can be prevented from seeing the display screen showing thedetailed explanation unnecessary to see.

In the present invention, instruction receiving portion for receiving aninstruction to switch the display of the display portion to anotherscreen from the operator, and the display controller causes the displayportion to display the operation guide by repeatedly reproducing therespective screens constituting the operation procedure at apredetermined speed in rotation, and switches the display of the displayportion to another screen and sets a speed at which the another screenis switched to a next screen slower than the predetermined speed if aninstruction to switch the display of the display portion to anotherscreen is received by the instruction receiving portion.

According to this invention, the operator can confirm another screendifferent from the screen being displayed on the display portion for along time only by carrying out a simple operation of inputting theinstruction to switch to another screen to the instruction receivingportion.

In the present invention, the display controller switches the display ofthe display portion to another screen and causes the another screen tobe displayed as a still image if the instruction to switch the displayof the display portion to another screen is received by the instructionreceiving portion.

According to this invention, the operator can confirm another screenswitched from the screen being displayed on the display portion for alonger time by carrying out a simple operation.

In the present invention, the instruction receiving portion receives aninstruction to switch the display of the display portion to the firstpreceding screen as the display switching instruction to switch thedisplay to another screen, and the display controller switches thedisplay of the display portion to the first preceding screen and causesthe first preceding screen to be displayed as a still image if thedisplay switching instruction is received by the instruction receivingportion.

According to this invention, the operator can confirm the firstpreceding screen of the screen being displayed for a long time bycarrying out a simple operation.

In the present invention, the instruction receiving portion receives aninstruction to switch the display of the display portion to the firstscreen of the operation procedure as the display switching instructionto switch the display to another screen, and the display controllerswitches the display of the display portion to the first screen andcauses the first screen to be displayed as a still image if the displayswitching instruction is received by the instruction receiving portion.

According to this invention, the operator can switch to the first screenof the operation procedure and can confirm this first screen for a longtime by carrying out a simple operation.

In the present invention, instruction input portion to which aninstruction from the operator is inputted in a plurality of operationmodes adapted by the operator; and display screen discriminating portionfor discriminating an instruction inputted to the instruction inputportion and the display screen indicated by this instruction, and in thedisplay controller causes the display portion to display the operationguide by repeatedly reproducing the respective screens constituting theoperation procedure at a predetermined speed in rotation, and switchesthe display of the display portion to the discriminated display screenif the display screen is discriminated by the display screendiscriminating portion.

According to this invention, the operator can cause the display portionto display the screen corresponding to each instruction by changing theoperation mode adapted at the instruction input portion to input one ofa plurality of different instructions corresponding to the respectiveoperation modes. Thus, the operator can immediately switch the displayscreen to a desired one through a simple operation even withoutproviding many keys.

In the present invention, the display screen discriminating portiondiscriminates the display screen indicated by the instruction inputtedin a predetermined operation mode as the first screen of the operationprocedure if the predetermined operation mode is adapted at theinstruction input portion by the operator.

According to this invention, the operator can cause the first screen tobe immediately displayed on the display portion through a simpleoperation even without carrying out a complicated operation of judging atiming to input the instruction while looking at the display screen ofthe display portion.

In the present invention, judging portion for judging whether or not therespective operations guided by the operation guide have been completedby the operator is further provided, and the display screendiscriminating portion discriminates the display screen indicated by theinstruction inputted in a predetermined operation mode as the screenshowing the operation succeeding the one judged to have been completedby the judging portion if the predetermined operation mode is adapted atthe instruction input portion by the operator.

According to this invention, the operator can cause the display portionto immediately display the screen showing the operation to be performednext through a simple operation even without carrying out a complicatedoperation of judging a timing to input the instruction while looking atthe display screen of the display portion.

In the present invention, first and second instruction input portionsconstituting the instruction input portion, and judging portion forjudging whether or not the respective operations guided by the operationguide have been completed by the operator are further provided, and thedisplay screen discriminating portion discriminates the display screenindicated by the instruction inputted in a predetermined operation modeas the screen showing the operation succeeding the one judged to havebeen completed by the judging portion if the predetermined operationmode is adapted at the first instruction input portion by the operatorand discriminates the display screen indicated by the instructioninputted in the predetermined operation mode as the first screen of theoperation procedure if the predetermined operation mode is adapted atthe second instruction input portion by the operator.

According to this invention, the operator can cause the display portionto selectively, easily and immediately display the first screen and thescreen showing the operation to be performed next even without carryingout a complicated operation of judging a timing to input the instructionwhile looking at the display screen of the display portion.

As this invention may be embodied in several forms without departingfrom the spirit of essential characteristics thereof, the presentembodiment is therefore illustrative and not restrictive, since thescope of the invention is defined by the appended claims rather than bythe description preceding them, and all changes that fall within metesand bounds of the claims, or equivalence of such metes and bounds aretherefore intended to embraced by the claims.

This application is based on Japanese Patent application serial Nos.2006-049265, 2006-049266, 2006-049267, 2006-049350 and 2006-049351 filedin Japan Patent Office on Feb. 24, 2006, the contents of which arehereby incorporated by reference.

Although the present invention has been fully described by way ofexample with reference to the accompanying drawings, it is to beunderstood that various changes and modifications will be apparent tothose skilled in the art. Therefore, unless otherwise such changes andmodifications depart from the scope of the present invention hereinafterdefined, they should be construed as being included therein.

1. An image forming apparatus, comprising: display portion fordisplaying an operation guide to an operator; and display controller forcausing the display portion to display an operation procedure comprisedof a plurality of operation as the operation guide while automaticallyswitching the respective operations in rotation.
 2. An image formingapparatus according to claim 1, wherein the display controller causesthe display portion to display the stage of the operation beingdisplayed in the operation procedure when the display screens of therespective operations constituting the operation procedure aredisplayed.
 3. An image forming apparatus according to claim 2, whereinthe display controller causes the stage of the operation being displayedin the operation procedure to be displayed by causing the display of thenumber of all the operations constituting the operation procedure andthe order of the predetermined operation to be performed at the presentmoment by the operator in all the operations.
 4. An image formingapparatus according to claim 1, wherein the display controller causesall the operations constituting the operation procedure to be displayedand causes the predetermined operation to be performed at the presentmoment by the operator to be displayed differently from the precedingand succeeding operations when the respective operations constitutingthe operation procedure are displayed.
 5. An image forming apparatusaccording to claim 1, further comprising judging portion for judgingwhether or not the respective operations constituting the operationprocedure have been completed by the operator, wherein the displaycontroller causes all the operations constituting the operationprocedure to be displayed and causes the operation judged to have beencompleted by the judging portion to be displayed differently from theother operations when the respective operations constituting theoperation procedure are displayed.
 6. An image forming apparatusaccording to claim 1, further comprising judging portion for judgingwhether or not the respective operations constituting the operationprocedure have been completed by the operator, wherein the displaycontroller causes the display portion to display the operation guide byrepeatedly reproducing the display screens of the respective operationsconstituting the operation procedure in rotation after changing thedisplay format of the display screen showing the operation judged tohave been completed by the judging portion to the one different fromthat of the other operations.
 7. An image forming apparatus according toclaim 6, wherein the display controller causes the display portion todisplay the operation guide by repeatedly reproducing the displayscreens of the respective operations constituting the operationprocedure in rotation after causing the display format of the displayscreen showing the operation judged to have been completed by thejudging portion to differ from that of the display screens of the otheroperations and deleting a display portion that became unnecessary forthe guidance of the operator upon the completion of the operation.
 8. Animage forming apparatus according to claim 1, further comprisinginstruction receiving portion for receiving an instruction to pause thedisplay screen of the display portion from the operator, wherein thedisplay controller causes the display portion to display the operationguide by repeatedly reproducing the plurality of screens constitutingthe operation procedure at a predetermined speed in rotation, and causesthe display portion to display the detailed explanation of the operationguided on the screen being displayed when a pause instruction isreceived if the pause instruction from the operator is received by theinstruction receiving portion.
 9. An image forming apparatus accordingto claim 8, further comprising judging portion for judging whether ornot the respective operations guided by the operation guide have beencompleted by the operator is further provided, wherein the displaycontroller resumes the repeated reproduction of the respective screensconstituting the operation procedure if the operation guided on thescreen being displayed is judged to have been completed by the judgingportion when the detailed explanation is displayed on the displayportion.
 10. An image forming apparatus according to claim 9, whereinthe display controller resumes the repeated reproduction of therespective screens constituting the operation procedure from the screenshowing the operation succeeding the one judged to have been completedif the operation guided on the screen being displayed is judged to havebeen completed by the judging portion when the detailed explanation isdisplayed on the display portion.
 11. An image forming apparatusaccording to claim 8, further comprising judging portion for judgingwhether or not the respective operations guided by the operation guidehave been completed by the operator, wherein the display controllercauses the display portion to display the detailed explanation on theoperation guided on the screen being displayed if the pause instructionfrom the operator is received by the instruction receiving portion andthe operation guided on the screen being displayed is judged not to havebeen completed by the judging portion.
 12. An image forming apparatusaccording to claim 11, wherein the display controller causes the screenbeing displayed to pause and to be displayed on the display portionwithout displaying the detailed explanation of the operation guided onthe screen being displayed if the pause instruction from the operator isreceived by the instruction receiving portion and the operation guidedon the screen being displayed is judged to have been completed by thejudging portion.
 13. An image forming apparatus according to claim 1,further comprising instruction receiving portion for receiving aninstruction to switch the display of the display portion to anotherscreen from the operator, wherein the display controller causes thedisplay portion to display the operation guide by repeatedly reproducingthe respective screens constituting the operation procedure at apredetermined speed in rotation, and switches the display of the displayportion to another screen and sets a speed at which the another screenis switched to a next screen slower than the predetermined speed if aninstruction to switch the display of the display portion to anotherscreen is received by the instruction receiving portion.
 14. An imageforming apparatus according to claim 13, wherein the display controllerswitches the display of the display portion to another screen and causesthe another screen to be displayed as a still image if the instructionto switch the display of the display portion to another screen isreceived by the instruction receiving portion.
 15. An image formingapparatus according to claim 13, wherein: the instruction receivingportion receives an instruction to switch the display of the displayportion to the first preceding screen as the display switchinginstruction to switch the display to another screen, and the displaycontroller switches the display of the display portion to the firstpreceding screen and causes the first preceding screen to be displayedas a still image if the display switching instruction is received by theinstruction receiving portion.
 16. An image forming apparatus accordingto claim 13, wherein: the instruction receiving portion receives aninstruction to switch the display of the display portion to the firstscreen of the operation procedure as the display switching instructionto switch the display to another screen; and the display controllerswitches the display of the display portion to the first screen andcauses the first screen to be displayed as a still image if the displayswitching instruction is received by the instruction receiving portion.17. An image forming apparatus according to claim 1, further comprising:instruction input portion to which an instruction from the operator isinputted in a plurality of operation modes adapted by the operator; anddisplay screen discriminating portion for discriminating an instructioninputted to the instruction input portion and the display screenindicated by this instruction, wherein the display controller causes thedisplay portion to display the operation guide by repeatedly reproducingthe respective screens constituting the operation procedure at apredetermined speed in rotation, and switches the display of the displayportion to the discriminated display screen if the display screen isdiscriminated by the display screen discriminating portion.
 18. An imageforming apparatus according to claim 17, wherein the display screendiscriminating portion discriminates the display screen indicated by theinstruction inputted in a predetermined operation mode as the firstscreen of the operation procedure if the predetermined operation mode isadapted at the instruction input portion by the operator.
 19. An imageforming apparatus according to claim 17, further comprising judgingportion for judging whether or not the respective operations guided bythe operation guide have been completed by the operator, wherein thedisplay screen discriminating portion discriminates the display screenindicated by the instruction inputted in a predetermined operation modeas the screen showing the operation succeeding the one judged to havebeen completed by the judging portion if the predetermined operationmode is adapted at the instruction input portion by the operator.
 20. Animage forming apparatus according to claim 17, further comprising: firstand second instruction input portions constituting the instruction inputportion; and judging portion for judging whether or not the respectiveoperations guided by the operation guide have been completed by theoperator, wherein the display screen discriminating portiondiscriminates the display screen indicated by the instruction inputtedin a predetermined operation mode as the screen showing the operationsucceeding the one judged to have been completed by the judging portionif the predetermined operation mode is adapted at the first instructioninput portion by the operator and discriminates the display screenindicated by the instruction inputted in the predetermined operationmode as the first screen of the operation procedure if the predeterminedoperation mode is adapted at the second instruction input portion by theoperator.